CN201066840Y - Mobile phone with earphone interface multiplexing circuit - Google Patents
Mobile phone with earphone interface multiplexing circuit Download PDFInfo
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- CN201066840Y CN201066840Y CNU200720024563XU CN200720024563U CN201066840Y CN 201066840 Y CN201066840 Y CN 201066840Y CN U200720024563X U CNU200720024563X U CN U200720024563XU CN 200720024563 U CN200720024563 U CN 200720024563U CN 201066840 Y CN201066840 Y CN 201066840Y
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Abstract
The utility model discloses a mobile phone which is equipped with a headphone interface reuse circuit. The motile phone comprises a main processor, an audio processing circuit, a functional module storing software programs and a headphone interface which comprises a plurality of pins. In the headphone interface, a part of pins for transmitting headphone signals are reused as pins for updating software which are respectively connected with a public end of a gating element. A first alternating channel of the gating element is connected with the functional module, a second alternating channel is connected with the audio processing circuit, and a gating control end receives gating signals which are sent out by the main processor to further select one alternating channel to be communicated with the public end of the alternating channel. Through reusing the headphone interface, the utility model realizes the loading updating function of the mobile phone software programs under the premise of not adding a mobile phone additional interface and can satisfy the online upgrading requirement of the mobile phone without disassembling the phone.
Description
Technical field
The utility model belongs to the mobile communication terminal device technical field, specifically, relates to a kind of earphone interface of cell phone and the multiplex circuit of software upgrading interface.
Background technology
Handheld communication devices is when function is expanded day by day, and miniaturization also is consistent development trend.And increasing along with function, the interface of handheld device and external device communication is also just more and more, if need all give an interface on the hardware with the module of PERCOM peripheral communication to each, certainly will cause the increase of handheld device volume, thereby run counter to the development trend of miniaturization Design.
By the cell phone that present people generally use, many mobile phones all are equipped with stereo wired earphone and stereosonic blue tooth function, just earphone interface and wireless transmitter module need be set on mobile phone accordingly.If will realize download and upgrade function to bluetooth procedures, realize optimizing with the BUG that solves original version or to performance, then upgrade interface need be set on mobile phone, to realize renewal to mobile phone medium blue tooth chip internal program.If also want mobile phone machine system program is upgraded upgrading, so also need on mobile phone, to be provided with accordingly the system software upgrading interface.Because need set up upgrade interface, so, will inevitably cause the increase of mobile phone volume, thereby be unfavorable for realizing the miniaturization Design of complete machine.
Therefore, how the existing earphone interface of mobile phone being also used as the software upgrading interface, thereby realizing the software upgrading function of mobile phone under the prerequisite of not setting up additional interface, is subject matter to be solved in the utility model with the miniaturization Design trend that is fit to mobile phone.
The utility model content
The purpose of this utility model is to provide a kind of multiplex circuit of earphone interface, make it be also used as the software upgrading interface of mobile phone, thereby under the prerequisite that does not increase the mobile phone additional interface, realized the software upgrading function of system, efficiently solved existing mobile phone owing to set up the problem that additional interface causes machine volume to increase.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of cell phone with earphone interface multiplex circuit, in described mobile phone, include primary processor, audio frequency processing circuit, store the functional module and the earphone interface that includes a plurality of pins of software program, wherein, in described earphone interface, wherein the part pin multiplexing that is used to transmit earphone signal is made software upgrading connects one road gating element separately with pin common port, the first alternative passage of described gating element connects described functional module, the second alternative passage connects described audio frequency processing circuit, its gating control end receives the gating signal that primary processor sends, and then selects wherein that one tunnel alternative passage is connected with its common port.
Further, in described earphone interface, its ground pin is also used as the software upgrading ground pin.Described gating element can be selected to realize with the single-pole double-throw switch (SPDT) chip.
Further again, in described earphone interface, include the idle pin that need not to transmit earphone signal, connect described functional module used as software upgrading with pin; Wherein one road pin connects DC power supply as software upgrading with power pin, and is connected with the power end of described functional module; Another road pin connects the clock end of described functional module with the clock signal pin as software upgrading.
Further again, in described earphone interface, include two pins that transmit the left and right acoustic channels voice signal, be also used as software upgrading transfer of data pin MISO, MOSI or I
2C bus pin SDA, SCL connect the common port of described gating element, and the first alternative passage of described gating element connects the data transmission terminal or the I of described functional module
2C bus end, the second alternative passage connect the left and right acoustic channels voice signal output of described audio frequency processing circuit.And the earphone in the earphone interface inserts the chip selection signal transmission pin that the detection pin is also used as described functional module, the common port that connects one road gating element, the first alternative passage of described gating element connects the sheet choosing end of described functional module, and the second alternative passage connects the output channel selecting side of described audio frequency processing circuit.
Further, described functional module can be a Bluetooth chip, to realize the down loading updating of bluetooth procedures; Or the cell phone system program storage, to realize the renewal upgrading of machine system.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is by carrying out multiplexing to the part pin in the earphone interface, functional modules such as its Bluetooth chip that is also used as software upgrading interface and mobile phone inside or program storage are connected, thereby under the prerequisite that does not increase the mobile phone additional interface, realized the down loading updating function of software program, need not the online upgrading requirement that the machine of tearing open can satisfy mobile phone.Adopt this earphone interface multiplex technique both to reduce hardware cost, saved taking up room of pcb board again, help the miniaturization Design of mobile phone.
Description of drawings
Fig. 1 is the earphone interface multiplex circuit schematic diagram that the utility model proposes.
Embodiment
Below in conjunction with accompanying drawing execution mode of the present utility model is done to describe in further detail.
The utility model is by with the multiplexing software upgrading interface of doing of the earphone interface on the mobile phone, the pin multiplexing that utilizes in the earphone interface part wherein to be used to transmit earphone signal is made the software upgrading pin, the common port that connects one road gating element separately, the first alternative passage of described gating element connects the functional module that need carry out software upgrading, the second alternative passage connects the audio frequency processing circuit in the mobile phone, its gating control end receives the gating signal that the mobile phone primary processor sends, when having detected the earphone insertion, select to be communicated with the second alternative passage, make by the left and right acoustic channels voice signal of audio frequency processing circuit output and export by earphone; And when needs carry out the software upgrading operation, select the first alternative passage to be connected, thereby utilize outer PC or other updating apparatus that the functional module of mobile phone inside is carried out program download and renewal with its common port.When in the described earphone interface idle pin being arranged, for simplifying circuit structure, can select these idle pins to be connected directly to described functional module with pin as software upgrading, cause the anxiety in pcb board space with the too much use of avoiding the gating element.Adopt the sort circuit structure just can under the prerequisite that does not increase the mobile phone additional interface, realize the download and the upgrade function of its internal processes.
Embodiment one, present embodiment is the earphone interface multiplex technique that example is specifically set forth the utility model and proposed with the handheld communication devices that has stereosonic blue tooth function and stereo wired earphone simultaneously, specific implementation cooperates special-purpose data download line to finish the download and the upgrading task of bluetooth procedures by the stereophone interface on the existing mobile phone, and its circuit structure is referring to shown in Figure 1.
Among Fig. 1, stereophone interface XP1 comprises 8 pins, and wherein earphone cord will use 6: microphone pin MIC (Pin2), L channel voice signal pin SP+ (Pin3), right channel sound signal pin SP-(Pin6), earphone insert detection signal pin IO (Pin7) and two ground pin GND (Pin1 and Pin8).Remaining two pin SP_C4, SP_C5 (Pin4 and Pin5) are idle pin among the earphone interface XP1.In the present embodiment, utilize idle pin Pin4 as the clock end CLK of software upgrading with clock signal pin connection Bluetooth chip, transmission serial clock signal.Utilize idle pin Pin5 as the software upgrading power pin, connect the 2.8V DC power supply VBT28 of mobile phone inside on the one hand, connect the feeder ear of Bluetooth chip on the other hand.When mobile phone power-on, utilize the DC power supply VBT28 of mobile phone inside to provide working power for Bluetooth chip; When mobile phone shutdown, outer PC or software upgrading equipment provide 2.8V working power by pin Pin5 to Bluetooth chip, make mobile phone still can realize the down loading updating function of bluetooth procedures under off-mode.The ground pin Pin1 of earphone interface XP1, Pin8 are also used as the software upgrading ground pin, connect mobile phone built-in system ground.
In earphone interface XP1, the Pin3 and the Pin6 pin that are used to transmit the left and right acoustic channels voice signal are also used as transfer of data pin MISO and the MOSI that transmits bluetooth procedures, and wherein, MISO is a main frame input slave output pin; MOSI is a main frame output slave input pin, connects the MISO and the MOSI pin of described Bluetooth chip respectively, realizes Bluetooth chip and outer PC or software upgrading data transfer between devices.In order to be implemented in effective switching of carrying out signalling channel between left and right acoustic channels voice signal and the bluetooth procedures, on circuit board of mobile phone, have additional a two-way single-pole double-throw switch (SPDT) chip N1, its power end VDD connects the DC power supply VBAT_M in the mobile phone, capacitor C 9 strobes, the wave interference of making an uproar in the filter out power; Two-way common port D1, the D2 of two-way single-pole double-throw switch (SPDT) chip N1 is connected with the Pin3 pin is corresponding with the Pin6 of described earphone interface XP1 respectively; Two-way gating control end IN1, IN2 receive the gating signal BTLOADSWITCH from the mobile phone primary processor respectively; Wherein, the first alternative passage S1A of first via single-pole double-throw switch (SPDT) connects the MOSI pin of Bluetooth chip, the filter circuit of the second alternative passage S1B by being made up of resistance R 2 and capacitor C 5, C6 is through the right channel sound signal output part HEADSET_R of coupling capacitance C4 connection audio frequency processing circuit; In like manner, the first alternative passage S2A of No. the second single-pole double-throw switch (SPDT) connects the MISO pin of Bluetooth chip, the filter circuit of the second alternative passage S2B by being made up of resistance R 1 and capacitor C 2, C3 is through the L channel audio signal output terminal HEADSET_L of coupling capacitance C1 connection audio frequency processing circuit.Like this, the high-low level state of the gating signal BTLOADSWITCH that two-way single-pole double-throw switch (SPDT) chip N1 receives according to its gating control end IN1, IN2, select the wherein one tunnel alternative passage in each road single-pole double-throw switch (SPDT) to be connected with the common port of himself, with realize pin Pin3, Pin6 is connected with the left and right acoustic channels audio signal output terminal of audio frequency processing circuit or be connected with data pins MISO, the MOSI of Bluetooth chip.We know, when mobile phone shutdown, each pin current potential of primary processor is zero, also can carry out the download and upgrade of bluetooth procedures when being implemented in mobile phone shutdown, described two-way single-pole double-throw switch (SPDT) chip N1 is when receiving low level gating signal BTLOADSWITCH, be communicated with its first alternative pathway S1A, S2A, with the be connected communication of realization interface XP1 with Bluetooth chip; And when gating signal BTLOADSWITCH is high level, be communicated with its second alternative pathway S1B, S2B, to realize the connecting path of interface XP1 and left and right acoustic channels, the stereo language signal is exported by earphone.
In like manner, also be connected with No. one single-pole double-throw switch (SPDT) chip N2 on the earphone insertion detection signal pin Pin7 of earphone interface XP1, its power end VDD connects the DC power supply VBAT_M on the circuit board of mobile phone, and capacitor C 8 strobes; Its common port D connects pin Pin7, gating control end IN receives the gating signal BTLOADSWITCH that primary processor sends, the first alternative passage S2 connects the chip selection signal end CSB of Bluetooth chip, the second alternative passage S1 connects the output channel selecting side of audio frequency processing circuit by the filter circuit of being made of resistance R 4, capacitor C 7, insert detection signal HEADSET_DETECT to its output earphone, select voice signal to export by earpiece output or by handset earphone according to its high-low level state.Certainly, when having detected the earphone insertion, should automatically switch to the earphone output channel.On earphone insertion detection signal HEADSET_DETECT line, also be connected with the pull-up resistor R3 branch road of moving DC power supply VWEM1 to, to guarantee the transmission accurately and reliably of high level signal.
In addition, the diode D1～D4 among Fig. 1 is transient voltage and suppresses diode TVS, is connected on Pin2, Pin3, Pin6, the Pin7 pin of earphone interface XP1, with release electrostatic.In mobile phones design, the place that can contact with the outside generally all needs to add electrostatic protection device, to prevent electrostatic breakdown.
When mobile phone is in open state, primary processor acquiescence output high-level strobe signal BTLOADSWITCH, control earphone interface XP1 is connected with audio frequency processing circuit, and the control audio frequency processing circuit switches to the earphone output channel when having detected the earphone insertion, at this moment, the mobile phone primary processor carries out exchanges data by serial ports and Bluetooth chip, and wakes up mutually by two GPIO mouths, realizes the Bluetooth wireless communication function of mobile phone.And when the user carried out the bluetooth procedures download instruction, primary processor output low level gating signal BTLOADSWITCH, control earphone interface XP1 used as the program upgrade interface, were communicated with itself and the connecting path of Bluetooth chip, with the transmission of wait ROMPaq.At this moment, the 8 pin interfaces of outside bluetooth procedures being downloaded industrial siding are plugged on the described earphone interface XP1, the other end can connect 9 needle serial ports, 25 pin parallel ports or the USB interface etc. of outer PC, carries out realizing after the conversion of data format the download and the upgrading of bluetooth procedures through data converter.
By above earphone interface multiplex circuit structure as can be seen: the upgrading of bluetooth procedures need take at least 6 pins of earphone interface, respectively corresponding its GND, MISO, CLK, VBT28, MOSI, CSB pin, therefore, be fit to be applied in the mobile phone circuit of the earphone interface that is provided with at least 6 pins.For save pins takies, described MISO, MOSI, CLK pin can be selected I for use
2C bus SDA, SCL realize, two pins that only need take earphone interface can be realized the transmission of data and clock signal, like this, described multiplex circuit is applicable in the mobile phone circuit of the earphone interface that includes 5 or 5 above pins, enlarges its scope of application.
Certainly, described two-way single-pole double-throw switch (SPDT) chip N1 and single channel single-pole double-throw switch (SPDT) chip N2 also can adopt other gating elements with gating switch effect or chip to realize that the utility model is not limited thereto.In addition, described Bluetooth chip is replaced with the storage chip of memory mobile phone system working procedure, can realize the down loading updating of cell phone system software, realize the online upgrading of complete machine function.
Above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example; variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1. cell phone with earphone interface multiplex circuit, in described mobile phone, include primary processor, audio frequency processing circuit, store the functional module and the earphone interface that includes a plurality of pins of software program, it is characterized in that: in described earphone interface, wherein the part pin multiplexing that is used to transmit earphone signal is made software upgrading connects one road gating element separately with pin common port, the first alternative passage of described gating element connects described functional module, the second alternative passage connects described audio frequency processing circuit, its gating control end receives the gating signal that primary processor sends, and then selects wherein that one tunnel alternative passage is connected with its common port.
2. cell phone according to claim 1 is characterized in that: in described earphone interface, its ground pin is also used as the software upgrading ground pin.
3. cell phone according to claim 1 is characterized in that: described gating element is the single-pole double-throw switch (SPDT) chip.
4. cell phone according to claim 1 is characterized in that: include the idle pin that need not to transmit earphone signal in described earphone interface, connect described functional module used as software upgrading with pin.
5. cell phone according to claim 4 is characterized in that: in described idle pin, wherein one road pin connects DC power supply as software upgrading with power pin, and is connected with the power end of described functional module.
6. cell phone according to claim 4 is characterized in that: in described idle pin, wherein one road pin connects the clock end of described functional module with the clock signal pin as software upgrading.
7. according to each described cell phone in the claim 1 to 6, it is characterized in that: two pins that in described earphone interface, include transmission left and right acoustic channels voice signal, be also used as software upgrading transfer of data pin MISO, MOSI, the common port that connects described gating element, the first alternative passage of described gating element connects the transfer of data pin of described functional module, and the second alternative passage connects the left and right acoustic channels voice signal output of described audio frequency processing circuit.
8. according to each described cell phone in the claim 1 to 6, it is characterized in that: in described earphone interface, include earphone and insert the detection pin, the chip selection signal transmission pin that is also used as described functional module, the common port that connects one road gating element, the first alternative passage of described gating element connects the sheet choosing end of described functional module, and the second alternative passage connects the output channel selecting side of described audio frequency processing circuit.
9. according to each described cell phone in the claim 1 to 5, it is characterized in that: in described earphone interface, include two pins of transmission left and right acoustic channels voice signal, be also used as software upgrading I
2C bus pin SDA, SCL connect the common port of described gating element, and the first alternative passage of described gating element connects the I of described functional module
2C bus end, the second alternative passage connect the left and right acoustic channels voice signal output of described audio frequency processing circuit.
10. according to each described cell phone in the claim 1 to 5, it is characterized in that: described functional module is a Bluetooth chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720024563XU CN201066840Y (en) | 2007-06-27 | 2007-06-27 | Mobile phone with earphone interface multiplexing circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU200720024563XU CN201066840Y (en) | 2007-06-27 | 2007-06-27 | Mobile phone with earphone interface multiplexing circuit |
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| CN201066840Y true CN201066840Y (en) | 2008-05-28 |
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| CNU200720024563XU Expired - Fee Related CN201066840Y (en) | 2007-06-27 | 2007-06-27 | Mobile phone with earphone interface multiplexing circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102057662A (en) * | 2008-06-13 | 2011-05-11 | 索尼爱立信移动通讯有限公司 | Method for reducing a disturbance in an input signal caused by an output signal in a multi-port connector, multi-port connector, and mobile device |
| CN102281482A (en) * | 2011-07-11 | 2011-12-14 | 浙江大学 | Function extension method and device thereof for earphone jack of smart phone |
| CN102572352A (en) * | 2011-12-26 | 2012-07-11 | 中兴通讯股份有限公司 | HDMI multiplexing method, HDMI, and equipped provided with HDMI |
| CN103220598A (en) * | 2012-01-18 | 2013-07-24 | 天地融科技股份有限公司 | Audio interface adaptive device and audio signal receiving device |
| CN105528317A (en) * | 2014-09-30 | 2016-04-27 | 展讯通信（上海）有限公司 | Mobile terminal |
| CN110916655A (en) * | 2019-12-13 | 2020-03-27 | 北京理工大学 | Portable electroencephalogram acquisition system |
| CN111147101A (en) * | 2019-12-31 | 2020-05-12 | 龙迅半导体（合肥）股份有限公司 | Data switch and data transmission system |
| GB2586677A (en) * | 2019-03-26 | 2021-03-03 | Tymphany Acoustic Tech Huizhou Co Ltd | System and method of updating firmwave |
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2007
- 2007-06-27 CN CNU200720024563XU patent/CN201066840Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102057662B (en) * | 2008-06-13 | 2013-11-06 | 索尼爱立信移动通讯有限公司 | Method for reducing a disturbance in an input signal caused by an output signal in a multi-port connector, multi-port connector, and mobile device |
| CN102057662A (en) * | 2008-06-13 | 2011-05-11 | 索尼爱立信移动通讯有限公司 | Method for reducing a disturbance in an input signal caused by an output signal in a multi-port connector, multi-port connector, and mobile device |
| CN102281482A (en) * | 2011-07-11 | 2011-12-14 | 浙江大学 | Function extension method and device thereof for earphone jack of smart phone |
| CN102572352B (en) * | 2011-12-26 | 2014-12-10 | 中兴通讯股份有限公司 | HDMI multiplexing method, HDMI, and equipped provided with HDMI |
| WO2013097356A1 (en) * | 2011-12-26 | 2013-07-04 | 中兴通讯股份有限公司 | Hdmi multiplexing method, hdmi, and hdmi-equipped device |
| CN102572352A (en) * | 2011-12-26 | 2012-07-11 | 中兴通讯股份有限公司 | HDMI multiplexing method, HDMI, and equipped provided with HDMI |
| CN103220598A (en) * | 2012-01-18 | 2013-07-24 | 天地融科技股份有限公司 | Audio interface adaptive device and audio signal receiving device |
| CN103220598B (en) * | 2012-01-18 | 2016-03-30 | 天地融科技股份有限公司 | A kind of audio interface adaptive device and audio signal reception equipment |
| CN105528317A (en) * | 2014-09-30 | 2016-04-27 | 展讯通信（上海）有限公司 | Mobile terminal |
| CN105528317B (en) * | 2014-09-30 | 2018-07-27 | 展讯通信（上海）有限公司 | Mobile terminal |
| GB2586677A (en) * | 2019-03-26 | 2021-03-03 | Tymphany Acoustic Tech Huizhou Co Ltd | System and method of updating firmwave |
| CN110916655A (en) * | 2019-12-13 | 2020-03-27 | 北京理工大学 | Portable electroencephalogram acquisition system |
| CN111147101A (en) * | 2019-12-31 | 2020-05-12 | 龙迅半导体（合肥）股份有限公司 | Data switch and data transmission system |
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Granted publication date: 20080528 Termination date: 20110627 |